It varies from state to state and by facility. The national fee schedule for medicare patients, is $60.23. That said, the doctor may want more done then just the challenge test.
Now, many insurance companies pay way more then that. Example a full pulmonary function will get $230 from Medicare but $510 from Blue Cross/Blue Shield. So doctors offices and medical centers increase the amount of fee to reflect the private insurance costs.
It is very hard to answer this question with out knowing the state your in and then the facility can charge anything above that they want.
Now, many insurance companies pay way more then that. Example a full pulmonary function will get $230 from Medicare but $510 from Blue Cross/Blue Shield. So doctors offices and medical centers increase the amount of fee to reflect the private insurance costs.
It is very hard to answer this question with out knowing the state your in and then the facility can charge anything above that they want.